/*----------------------------------------------------------------------------
--  SOURCE FILE: roundrectitem.cpp
--
--  PROGRAM:
--
--
--  FUNCTIONS:
--      RoundRectItem           (const QRectF &rect, const QBrush &brush, QWidget *embeddedWidget = 0);
--      void paint              (QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *);
--      QRectF boundingRect     () const;
--      void setPixmap          (const QPixmap &pixmap);
--      qreal opacity           () const;
--      void setOpacity         (qreal opacity);
--      void activated          ();
--      void keyPressEvent      (QKeyEvent *event);
--      void keyReleaseEvent    (QKeyEvent *event);
--      void updateValue        (qreal value);
--
--  DATE: Feb 1, 2010
--
--  DESIGNER: Nokia
--
--  PROGRAMMER REVISIONS: Daraius Dastoor
--
--  NOTES:
--      Creates rounded rectanges. Nothing needs to be changed here besides size
--      values for different resolution.
----------------------------------------------------------------------------*/

#include "roundrectitem.h"

#include <QtGui/QtGui>

RoundRectItem::RoundRectItem(const QRectF &rect, const QBrush &brush, QWidget *embeddedWidget) : QGraphicsRectItem(rect), brush(brush), timeLine(75), lastVal(0), opa(1), proxyWidget(0)
{
    connect(&timeLine, SIGNAL(valueChanged(qreal)), this, SLOT(updateValue(qreal)));

    if(embeddedWidget)
    {
        proxyWidget = new QGraphicsProxyWidget(this);
        proxyWidget->setFocusPolicy(Qt::StrongFocus);
        proxyWidget->setWidget(embeddedWidget);
        proxyWidget->setGeometry(boundingRect().adjusted(25, 25, -25, -25));
    }
}

void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
{
    QTransform x = painter->worldTransform();

    QLineF unit = x.map(QLineF(0, 0, 1, 1));
    if(unit.p1().x() > unit.p2().x() || unit.p1().y() > unit.p2().y())
    {
        if(proxyWidget && proxyWidget->isVisible())
        {
            proxyWidget->hide();
            proxyWidget->setGeometry(rect());
        }
        return;
    }

    if(proxyWidget && !proxyWidget->isVisible())
    {
        proxyWidget->show();
        proxyWidget->setFocus();
    }
    if(proxyWidget && proxyWidget->pos() != QPoint())
    {
        proxyWidget->setGeometry(boundingRect().adjusted(15, 15, -5, -5));
    }

    painter->setOpacity(opacity());
    painter->setPen(Qt::NoPen);
    painter->setBrush(QColor(0, 0, 0, 64));
    painter->drawRoundRect(rect().translated(2, 2));

    if (!proxyWidget) {
        QLinearGradient gradient(rect().topLeft(), rect().bottomRight());
        const QColor col = brush.color();
        gradient.setColorAt(0, col);
        gradient.setColorAt(1, col.dark(int(200 + lastVal * 50)));
        painter->setBrush(gradient);
    } else {
        painter->setBrush(brush);
    }

    painter->setPen(QPen(Qt::black, 1));
    painter->drawRoundRect(rect());
    if (!pix.isNull()) {
        painter->scale(1.95, 1.95);
        painter->drawPixmap(-pix.width() / 2, -pix.height() / 2, pix);;
    }
}

QRectF RoundRectItem::boundingRect() const
{
    qreal penW = 0.5;
    qreal shadowW = 2.0;
    return rect().adjusted(-penW, -penW, penW + shadowW, penW + shadowW);
}

void RoundRectItem::setPixmap(const QPixmap &pixmap)
{
    pix = pixmap;
    if(scene() && isVisible())
    {
        update();
    }
}

qreal RoundRectItem::opacity() const
{
    RoundRectItem *parent = parentItem() ? (RoundRectItem *)parentItem() : 0;
    return opa + (parent ? parent->opacity() : 0);
}

void RoundRectItem::setOpacity(qreal opacity)
{
    opa = opacity;
    update();
}

void RoundRectItem::keyPressEvent(QKeyEvent *event)
{
    if(event->isAutoRepeat() || event->key() != Qt::Key_Return || (timeLine.state() == QTimeLine::Running && timeLine.direction() == QTimeLine::Forward))
    {
        QGraphicsRectItem::keyPressEvent(event);
        return;
    }

    timeLine.stop();
    timeLine.setDirection(QTimeLine::Forward);
    timeLine.start();
    emit activated();
}

void RoundRectItem::keyReleaseEvent(QKeyEvent *event)
{
    if(event->key() != Qt::Key_Return)
    {
        QGraphicsRectItem::keyReleaseEvent(event);
        return;
    }

    timeLine.stop();
    timeLine.setDirection(QTimeLine::Backward);
    timeLine.start();
}

void RoundRectItem::updateValue(qreal value)
{
    lastVal = value;
    if(!proxyWidget)
    {
        setTransform(QTransform().scale(1 - value / 10.0, 1 - value / 10.0));
    }
}
